#lunbo {
  ul {
    border: 1px solid #dedede;
    margin: 40px auto;
    overflow: hidden;
    height: 440px;
    width: 720px;
    box-sizing:content-box;
    img {
      height: 440px;
      width: 720px;
    }
  }
  div {
    img {
      opacity: 0.3;
      margin: 0 5px;
      height: 70px;
      width: 114px;
    }
  }
}